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Auto-Program Circuit Not Working Whatsoever

Posted: Thu Aug 13, 2020 3:55 pm
by dfrenkel
I've read just about every forum and post on this subject, but I cannot get the auto program circuit to work on a PCB or breadboard. It just does not enter into boot mode using the circuit.

Here's my setup:
Image

And here's the logic:
Image



As you can see, DTR and RTS are doing something, but they never pull G0 and EN low at the same time to enter boot mode.

On my breadboard, I'm using a CP2102N dev board with two SS8050CTA BJTs.

I just cannot figure this one out, and my product has been placed on hold for a while until I do. Thanks for any help you can provide